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    <title>Document</title>
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    <script>
        //call方法
        function fn(x,y){
            console.log("我想喝手磨咖啡");
            console.log(this);
            console.log(x+y);
        }
        var o = {
            name:'andy'
        };
        fn(1,2);
        //1.call()可以调用函数
        //2.call()可以改变这个函数的this指向，此时这个函数的this就指向了o这个对象
        fn.call(o,1,2);
    </script>
</body>
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